vacuum heating真空: vacuum; empty space; vacuo采暖: heating真空采暖系统: vacuum heating system vacuum return-line heating system; vacuum return-line heating system真空采气法: vacuum sampling method真空采血管: evacuated blood tube下载手机词典可随时随地查词查翻译关注微信公众号:chachacidian,回复:真空采暖,即可在微信中查询翻译